HydroBASINS lev08 watershed · #4081035540
Bassin de Sông Mã
A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.
Crosses 5 administrative regions across 2 countries : Mường Lát, Quan Hóa, Sopbao, Viengxay, Vân Hồ
Sub-basin area
685,6km²
Upstream area
14 131,7km²
Discharge
240,87m³/s
Mean elev.
690m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Sông Mã486 km²
- Bassin de ນຳ້ມາ59 km²
5 dept-equivalent regions (GADM L2)
- 616.0 km²90.1% of basin
- 36.9 km²5.4% of basin
- 25.8 km²3.8% of basin
- 3.2 km²0.5% of basin
- Vân HồSơn La · Vietnam1.8 km²0.3% of basin
2 intersecting protected areas
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
33 distinct species · 124 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Not enough documented interactions to build a meaningful graph for this territory.
Hydroclimate (BasinATLAS lev08)
Mean T°
20,8°C
Annual rain
1 399mm
Moisture idx (CMI)
0,06
Runoff
758mm/an
PET
1 318mm
AET
945mm
Mean slope
20,8°
Water table
722cm
Forest
3%
Crops
14%
Urban
0%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)